Projector



s`. GREBEL Jan. 2l, 1930.

PROJECTOR Filed May 21, 1928 4 sheets-sheet 1 Hfbrney,

S. GREBEL Jan. 2l, 1930.

PROJECTOR 4 Sheets-Sheet 2 fyi.

Jan.21,193o. SGgEBEL I 1,744,222

PROJECTOR Filed May 21. 1928 4 Sheets-Sheet 5 ad Y of {Ilford-ey Jan. 2l, 1930. s. GRI-:BEL 1,744,222

PROJECTOR Filed may 21, 192s 4 sheets-sheet 4 Patented Jan. 21, 1930 STEPHEN GREBEL,

F PARIS, FRANCE IPRQJECTOB .Application :filed Hay 21, 1928, Serial No. 279,340, and in Belgium Hay 25, 1927.

The present invention relates to luminous projectors.

One of the objects of the invention, is to provide means for mounting a lamp in a projector whereby the latter may be removed or replaced with greater ease than heretofore.

Another object is to provide a special mounting for a lamp in a projector intended to have an adjustable luminosity. l

Still another object is to provide means for varying the direction of the light beam emitted by the projector.

Additional objects will appear in the course of the detailed description now to be given with reference to the accompanying Fig. lis a vertical section through one illus-- trative embodiment of the invention;

, Fig. 2 is a section through a lamp mounting differing from the one shown in Fig. 1;

Fig. 3 isa section through stillanother form of projector;

Fig. 4 shows, diagrammatically, the manl ner in which the lamp support is to be mounted in the projector. j

The lamp mounting hereinafter to be described consists of a single support fitted with (l) a lamp designated police, (2) a lam for reduced villumination to be called a code lamp and (3) a lamp for high power illumination, to be referred to as a road lamp. j

Referring to Fig. 1 of the drawings, a represents the exterior shell of the projector 5 assembly,-b, a parabolic reflector,-c, a hingedly supported door serving as frame for lens d,-e, a' support for lamps f, g and v ltr-a", an opening adapted to receive tube i constituting the tail of the projector assembly,--a1, a union adapted to be brazed or y otherwise connected to tube i and aligned with opening a,-b2 an abutment for ixing` the position of reflector b,--o1, a counterelement 02,-and bs a ange adapted to coact with shell a.

' Before mounting reflector b inside the shell, a tube b1 is soldered thereto in order to provide a 'support and guide for tubez'. Reector b may be soldered to casing shell a or 1 abutment for b2, integral with a spacingconnected thereto in any other manner desired. Tube fi, provided with a notch il, is

inserted in the direction a1, a, b1 until it abuts against b and is then united to assembly a, b, by brazing, or soldering or by properly positioned rivets or screws.- This completes the projector assembly except for the lamps and their" support.

The lamp assembly consists of a bar e whose section isl that of U having its free edges bent inwardly and whose length is such as to permit it to about against b in line with an opening bo formed along a generatrix of b at one of its extremities and to, extend through a similar opening b diametrically opposite b,-a bolt e1 slidably'mounted in guide e2 and yforced outwardly by spring e3 to a position limited by bent rod et, the head of said bolt comprising an oblique surface emr-an abutment e5l rigidly connected to e and limiting the penetration of the latter into b,-a socket support e rigidly positioned on e in line with the optic'axis of the reflector,-an insulated or insulating terminal support j riveted at jl to bar e,-a small police lamp f having one pointed extremity in contact withV a small circular orifice formed in socket support e and the other in contact lam 7L through terminal L1,-and a spring m ten ing to force discslZ and n away from one another. Lamp h is mounted in socket 0 provided with the usual reilector 01.

The projector assembly is completed by any of the usual devices for fixing lens d in position, or by means of the special device shown in the drawing. Here, elements c1, c are designed to it into close contact with b, b2, a slightly relieved portion c3 being provided to correct for any play in the hinges (not shown) supporting door c. A ring p,

connected to cz by means of screws p1 and annular ring 2, serves `to maintain lens d rigidly in posltion against the free edge of door c.

The manner in which a lamp changing operation is effected is ractically self-evident from the foregoing escription. If surface e2 is given the proper curvature, a sharp pull on bar e will liberate upper extremityof the latter and, by providing a proper bevel on the lower end of e, the whole lamp supporting assembly may be removed. To put the latter back into place, the lower end of e is inserted into b and force is applied to the upper end so that elo first slides in contact with b, then into opening bo. It is thus seen that Without using any tools Whatever, the lamp sockets may be quickly made accessible. A properly sized opening e6 should be formed in e to permit examination or the repair of any of the elements contained there- 1n. I

The device represented in Fig. 2 differs from the one shown in Fig. 1 only in the mode of mounting elements y', Z and n, which are here supported together on a detachablev support g by means of a screw or other equivalent element. Spring m being eliminated, in this form of device, its function is fulfilled by a pair of resilient elements r formed of stiff piano cord or the like, supported in clamps g1.

In the modification shown in Fig. 3, bar e is formed of a single casting and is held in place by means of a male element l, forming part of a casting 2, which enters a recess in the upper extremity of e and is held in place by a spring actuated collar 3 slidably mounted on e. It will be noted further that, in this form of device, element i is replaced by casting 4 having a recessed upper portion adapted to coact with the lower end of e. Lens d is here held in place by ring p provided with a thread which coacts with a thread formed on c2. Lamp socket k is mounted in a tube 5 which is in turn mounted eccentrically in a collar 6 supported concentrically in shell 7.

What I claim is 1. In a projector, a reflector having an opening in a wall thereof, a lamp support having one end adapted to fit into said opening, means for supporting a lamp mounted intermediate the extremities of said support a conductor extending through said opening to said means, and manually operable means for locking the free end of said lamp support in contact with a predetermined portion of a wall of said reflector, said means being also manually operable to release the free end o the lamp support.

2. In a projector, a reflector having an opening in a wall thereof, a lamp supporting bar adapted to extend across said reflector, a lamp socket mounted on said bar intermediate the ends thereof, a conducting cable extending through said o'pening to said socket, and means operable to lock said bar in position when one end is inserted in said opening and the other end is movedinto position to-coact with a redetermined portion of the .Wall of .said re ector. c

3. In a projector, a refiector having a sloping Wall, said wall having an opening forme therethrou h, a lamp supporting bar having one end adapted to engage in said opening, a socket mounted on said bar, a cable extending through said opening to said socket, and reciprocatable means mounted on one end of said supporting bar and adapted to lock said bar in engagement With the sloping'wall of the reflector chamber, said last named means operating to release said bar When forced towards the interior of the re- Hector.

- STEPHEN GREBEL. 

